CCP have grand ambitions and so far they hve achieved it quite efficiently So they are not going to stop until they achieve it. CCP being friendly with india is not going to happen either untill it leave tibet.
And topic of population. I think it will not hamper their objectives,they does not have hostile minority like india and they are heavily investing in AI and Robotics,other 4th industrial revolution related tech.
friendly with us means cant meaningfully mess with our capabilities.dont believe there will ever be universal piece in the world.there will always be ambition and people and countries to carry forward this.who knows,tomorrow,when space is fully unlocked,you will see manifest destiny,mangalbharat,china must conquer space memes and actions based on it then.
basically anyone not arm twisting us is considered friendly with us.that can be achieved by 2 hands shaking - both the concerned countries kind of coming to equilibrium.in the china case - due to this demographic pressure,if they become a japan like state,it will be a good state,i dont understand why some people have an obsession with population growth,the future will belong to states that have managed high skill labour not bullshit ideology and iq low skill masses like pakistan.we should only worry about lowering the tfr of muzzies inside india and making india powerful,then peace with china will come naturally.
there is no peace in this world other than through strength.if you are weak then it is your fault.so all depends upon india going strong.not that china will lose its ambitions,it is just that it will not be able to mess with us.
I am very realistic about human nature,never believed in kumbaya philosophy,read a history book.